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The Info List - Heliscomyidae


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†_Apletotomeus _ _Heliscomys _ _Passaliscomys _ _Tylionomys _

HELISCOMYIDAE is a family of extinct rodents from the mid- Tertiary of North America
North America
related to pocket gophers (family Geomyidae ) and kangaroo rats and their relatives (family Heteromyidae ). The family contains four genera, _Apletotomeus _, _Heliscomys _, _Passaliscomys _, and _Tylionomys _ (Korth et al., 1991; Korth and Eaton, 2004; Korth and Branciforte, 2007). McKenna and Bell (1997) placed the first two genera in synonymy , with _Heliscomys_ the senior synonym.

CHARACTERISTICS

Heliscomyids are distinguished from other geomyoid rodents by several characteristics of the skull including fusion of three cranial foramina, elongation of the incisive foramina , and an unusual position of the mental foramen (Korth et al., 1991).

TAXONOMY

Heliscomyidae
Heliscomyidae
is a member of the clade Geomyoidea, a group of rodents that also includes the families †Eomyidae, †Florentiamyidae, Heteromyidae, and Geomyidae. The following cladogram showing interrelationships among geomyoid families follows Korth et al. (1991):

Geomyoidea

Eomyidae
Eomyidae

†HELISCOMYIDAE

Florentiamyidae

Geomyidae (pocket gophers)

Heteromyidae (kangaroo rats and mice, pocket mice)

REFERENCES

* Korth, W.W. and C. Branciforte, 2007. Geomyoid rodents (Mammalia) from the Ridgeview Local Fauna, early-early Arikareean (late Oligocene) of western Nebraska. _Annals of Carnegie Museum_ 76(3):177-201. * Korth, W.W. and J.G. Eaton, 2004. Rodents and a marsupial (Mammalia) from the Duchesnean (Eocene) Turtle Basin Local Fauna, Sevier Plateau, Utah. _Bulletin of Carnegie Museum of Natural History_ 36(1):109-119. * Korth, W.W., J.H. Wahlert, and R.J. Emry, 1991. A new species of _Heliscomys_ and recognition of the family Heliscomyidae
Heliscomyidae
(Geomyoidea: Rodentia) _Journal of Vertebrate Paleontology_ 11(2):247-256. * McKenna, Malcolm C., and Bell, Susan K. 1997. _Classification of Mammals Above the Species Level._ Columbia University Press, New York, 631 pp. ISBN 0-231-11013-8

* v * t * e

Prehistoric families in order Rodentia

* Kingdom: Animalia * Phylum: Chordata * Class: Mammalia * Infraclass: Eutheria * Superorder: Euarchontoglires

SCIUROMORPHA

* Allomyidae * Mylagaulidae * Reithroparamyidae

CASTORIMORPHA

* Eutypomyidae * Rhizospalacidae * Eomyidae
Eomyidae
* Florentiamyidae * Heliscomyidae

MYOMORPHA

* Armintomyidae * Anomalomyidae * Simimyidae

ANOMALUROMORPHA

* Parapedetidae

HYSTRICOMORPHA

* Tamquammyidae * Gobiomyidae * Yuomyidae * Chapattimyidae * Tsaganomyidae * "Baluchimyinae " * Bathyergoididae * Myophiomyidae * Diamantomyidae * Phiomyidae * Kenyamyidae * Cephalomyidae * Eocardiidae * Neoepi